Attwood 3899-3 Thread-to-Qwik-Lok Connector Fitting for 500-800 GPH Pumps

The Attwood 3899-3 is a thread-to-Flow-Rite Qwik-Lok connector fitting built for use with 500-800 GPH pumps, such as livewell, baitwell, and washdown pumps found on boats. One end of the fitting is threaded with a 3/4 inch-14 thread to install directly into a pump outlet, thru-hull, or fitting port, while the opposite end is designed to accept a Flow-Rite Qwik-Lok coupler, allowing hose sections to be connected and disconnected quickly without tools. This makes the 3899-3 a practical choice for boat owners who want a fast-release connection point in their plumbing run instead of a fixed barbed hose joint.

The fitting is finished in white and constructed with a machined stainless steel body, giving it corrosion resistance for continuous exposure to saltwater and bilge environments. Its compact size allows it to fit into tight plumbing runs typical of livewell and baitwell systems. Because it uses the Flow-Rite Qwik-Lok coupling standard, it pairs with other Qwik-Lok equipped hose ends and fittings in the same plumbing system, simplifying maintenance and hose changes.

Specifications

• Brand: Attwood
• Manufacturer Part Number: 3899-3
• Fitting Type: Thread-to-Flow-Rite Qwik-Lok Connector
• Compatible Pump Flow Rate: 500-800 GPH pumps
• Thread Size: 3/4 inch-14
• Material: Stainless Steel
• Exterior Finish: Machined
• Color: White
• Item Dimensions: 4.5 x 9.25 x 3.5 inches
• Weight: 0.085 pounds

Frequently Asked Questions

What does the Attwood 3899-3 connect? It joins a threaded pump or fitting port on one end to a Flow-Rite Qwik-Lok coupler on the other, letting a hose line be connected or released without tools.

What pumps is the 3899-3 fitting designed for? This connector is intended for use with 500-800 GPH pumps, such as those used in livewell, baitwell, and washdown plumbing systems.

What is the thread size on the Attwood 3899-3? The threaded end of the 3899-3 uses a 3/4 inch-14 thread that installs into a matching pump or fitting port.

Is the 3899-3 made of plastic or metal? The Attwood 3899-3 has a machined stainless steel body, giving it corrosion resistance for marine plumbing use.

What color is this fitting? The Attwood 3899-3 is finished in white.

How much does the Attwood 3899-3 weigh? The 3899-3 connector fitting weighs 0.085 pounds.

What are the dimensions of the 3899-3 fitting? As packaged, the Attwood 3899-3 measures 4.5 x 9.25 x 3.5 inches.

Do I need a separate Qwik-Lok coupler to use this fitting? Yes, the 3899-3 provides the threaded connection point and Qwik-Lok end; a mating Flow-Rite Qwik-Lok coupler on the hose side is needed to complete the quick-release connection.

Is there a barb-style version instead of the Qwik-Lok connector? Yes, the Attwood 3899-1 is the barb-connection version in the same fitting family, for those who prefer a hose barb over the Qwik-Lok quick-connect.

Can this fitting be used with any pump, or only specific flow rates? The 3899-3 is designed for use with 500-800 GPH pumps rather than higher-flow models.